ebf84ceca7
from U-Boot, the kernel is passed a standard argc/argv pair. The Juniper loader passes the metadata pointer as the second argument and passes 0 in the first. The FreeBSD loader passes the metadata pointer in the first argument. As such, have locore preserve the first 2 arguments in registers r30 & r31. Change e500_init() to accept these arguments. Don't pass global offsets (i.e. kernel_text and _end) as arguments to e500_init(). We can reference those directly. Rename e500_init() to booke_init() now that we're changing the prototype. In booke_init(), "decode" arg1 and arg2 to obtain the metadata pointer correctly. For the U-Boot case, clear SBSS and BSS and bank on having a static FDT for now. This allows loading the ELF kernel and jumping to the entry point without trampoline.
629 lines
16 KiB
C
629 lines
16 KiB
C
/*-
|
|
* Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
|
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/*-
|
|
* Copyright (C) 2001 Benno Rice
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
|
|
*/
|
|
/*-
|
|
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
|
|
* Copyright (C) 1995, 1996 TooLs GmbH.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by TooLs GmbH.
|
|
* 4. The name of TooLs GmbH may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_compat.h"
|
|
#include "opt_ddb.h"
|
|
#include "opt_kstack_pages.h"
|
|
#include "opt_platform.h"
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/time.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/cons.h>
|
|
#include <sys/cpu.h>
|
|
#include <sys/kdb.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/ktr.h>
|
|
#include <sys/syscallsubr.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/imgact.h>
|
|
#include <sys/msgbuf.h>
|
|
#include <sys/ptrace.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_page.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_pager.h>
|
|
|
|
#include <machine/cpu.h>
|
|
#include <machine/kdb.h>
|
|
#include <machine/reg.h>
|
|
#include <machine/vmparam.h>
|
|
#include <machine/spr.h>
|
|
#include <machine/hid.h>
|
|
#include <machine/psl.h>
|
|
#include <machine/trap.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/mmuvar.h>
|
|
#include <machine/sigframe.h>
|
|
#include <machine/metadata.h>
|
|
#include <machine/platform.h>
|
|
|
|
#include <sys/linker.h>
|
|
#include <sys/reboot.h>
|
|
|
|
#include <dev/fdt/fdt_common.h>
|
|
#include <dev/ofw/openfirm.h>
|
|
|
|
#include <powerpc/mpc85xx/mpc85xx.h>
|
|
|
|
#ifdef DDB
|
|
extern vm_offset_t ksym_start, ksym_end;
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
#define debugf(fmt, args...) printf(fmt, ##args)
|
|
#else
|
|
#define debugf(fmt, args...)
|
|
#endif
|
|
|
|
extern unsigned char kernel_text[];
|
|
extern unsigned char _etext[];
|
|
extern unsigned char _edata[];
|
|
extern unsigned char __bss_start[];
|
|
extern unsigned char __sbss_start[];
|
|
extern unsigned char __sbss_end[];
|
|
extern unsigned char _end[];
|
|
|
|
extern void dcache_enable(void);
|
|
extern void dcache_inval(void);
|
|
extern void icache_enable(void);
|
|
extern void icache_inval(void);
|
|
|
|
/*
|
|
* Bootinfo is passed to us by legacy loaders. Save the address of the
|
|
* structure to handle backward compatibility.
|
|
*/
|
|
uint32_t *bootinfo;
|
|
|
|
struct kva_md_info kmi;
|
|
struct pcpu __pcpu[MAXCPU];
|
|
struct trapframe frame0;
|
|
int cold = 1;
|
|
long realmem = 0;
|
|
long Maxmem = 0;
|
|
char machine[] = "powerpc";
|
|
SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
|
|
|
|
int cacheline_size = 32;
|
|
|
|
SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
|
|
CTLFLAG_RD, &cacheline_size, 0, "");
|
|
|
|
int hw_direct_map = 0;
|
|
|
|
static void cpu_e500_startup(void *);
|
|
SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_e500_startup, NULL);
|
|
|
|
void print_kernel_section_addr(void);
|
|
void print_kenv(void);
|
|
u_int booke_init(uint32_t, uint32_t);
|
|
|
|
static void
|
|
cpu_e500_startup(void *dummy)
|
|
{
|
|
int indx, size;
|
|
|
|
/* Initialise the decrementer-based clock. */
|
|
decr_init();
|
|
|
|
/* Good {morning,afternoon,evening,night}. */
|
|
cpu_setup(PCPU_GET(cpuid));
|
|
|
|
printf("real memory = %ld (%ld MB)\n", ptoa(physmem),
|
|
ptoa(physmem) / 1048576);
|
|
realmem = physmem;
|
|
|
|
/* Display any holes after the first chunk of extended memory. */
|
|
if (bootverbose) {
|
|
printf("Physical memory chunk(s):\n");
|
|
for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
|
|
size = phys_avail[indx + 1] - phys_avail[indx];
|
|
|
|
printf("0x%08x - 0x%08x, %d bytes (%ld pages)\n",
|
|
phys_avail[indx], phys_avail[indx + 1] - 1,
|
|
size, size / PAGE_SIZE);
|
|
}
|
|
}
|
|
|
|
vm_ksubmap_init(&kmi);
|
|
|
|
printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
|
|
ptoa(cnt.v_free_count) / 1048576);
|
|
|
|
/* Set up buffers, so they can be used to read disk labels. */
|
|
bufinit();
|
|
vm_pager_bufferinit();
|
|
}
|
|
|
|
static char *
|
|
kenv_next(char *cp)
|
|
{
|
|
|
|
if (cp != NULL) {
|
|
while (*cp != 0)
|
|
cp++;
|
|
cp++;
|
|
if (*cp == 0)
|
|
cp = NULL;
|
|
}
|
|
return (cp);
|
|
}
|
|
|
|
void
|
|
print_kenv(void)
|
|
{
|
|
int len;
|
|
char *cp;
|
|
|
|
debugf("loader passed (static) kenv:\n");
|
|
if (kern_envp == NULL) {
|
|
debugf(" no env, null ptr\n");
|
|
return;
|
|
}
|
|
debugf(" kern_envp = 0x%08x\n", (u_int32_t)kern_envp);
|
|
|
|
len = 0;
|
|
for (cp = kern_envp; cp != NULL; cp = kenv_next(cp))
|
|
debugf(" %x %s\n", (u_int32_t)cp, cp);
|
|
}
|
|
|
|
void
|
|
print_kernel_section_addr(void)
|
|
{
|
|
|
|
debugf("kernel image addresses:\n");
|
|
debugf(" kernel_text = 0x%08x\n", (uint32_t)kernel_text);
|
|
debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext);
|
|
debugf(" _edata = 0x%08x\n", (uint32_t)_edata);
|
|
debugf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start);
|
|
debugf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end);
|
|
debugf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start);
|
|
debugf(" _end = 0x%08x\n", (uint32_t)_end);
|
|
}
|
|
|
|
u_int
|
|
booke_init(uint32_t arg1, uint32_t arg2)
|
|
{
|
|
struct pcpu *pc;
|
|
void *kmdp, *mdp;
|
|
vm_offset_t dtbp, end;
|
|
uint32_t csr;
|
|
|
|
kmdp = NULL;
|
|
|
|
end = (uintptr_t)_end;
|
|
dtbp = (vm_offset_t)NULL;
|
|
|
|
/*
|
|
* Handle the various ways we can get loaded and started:
|
|
* - FreeBSD's loader passes the pointer to the metadata
|
|
* in arg1, with arg2 undefined. arg1 has a value that's
|
|
* relative to the kernel's link address (i.e. larger
|
|
* than 0xc0000000).
|
|
* - Juniper's loader passes the metadata pointer in arg2
|
|
* and sets arg1 to zero. This is to signal that the
|
|
* loader maps the kernel and starts it at its link
|
|
* address (unlike the FreeBSD loader).
|
|
* - U-Boot passes the standard argc and argv parameters
|
|
* in arg1 and arg2 (resp). arg1 is between 1 and some
|
|
* relatively small number, such as 64K. arg2 is the
|
|
* physical address of the argv vector.
|
|
*/
|
|
if (arg1 > (uintptr_t)kernel_text) /* FreeBSD loader */
|
|
mdp = (void *)arg1;
|
|
else if (arg1 == 0) /* Juniper loader */
|
|
mdp = (void *)arg2;
|
|
else /* U-Boot */
|
|
mdp = NULL;
|
|
|
|
/*
|
|
* Parse metadata and fetch parameters.
|
|
*/
|
|
if (mdp != NULL) {
|
|
preload_metadata = mdp;
|
|
kmdp = preload_search_by_type("elf kernel");
|
|
if (kmdp != NULL) {
|
|
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
|
|
kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
|
|
dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
|
|
end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
|
|
|
|
bootinfo = (uint32_t *)preload_search_info(kmdp,
|
|
MODINFO_METADATA | MODINFOMD_BOOTINFO);
|
|
|
|
#ifdef DDB
|
|
ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
|
|
ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
|
|
#endif
|
|
}
|
|
} else {
|
|
bzero(__sbss_start, __sbss_end - __sbss_start);
|
|
bzero(__bss_start, _end - __bss_start);
|
|
}
|
|
|
|
#if defined(FDT_DTB_STATIC)
|
|
/*
|
|
* In case the device tree blob was not retrieved (from metadata) try
|
|
* to use the statically embedded one.
|
|
*/
|
|
if (dtbp == (vm_offset_t)NULL)
|
|
dtbp = (vm_offset_t)&fdt_static_dtb;
|
|
#endif
|
|
|
|
if (OF_install(OFW_FDT, 0) == FALSE)
|
|
while (1);
|
|
|
|
if (OF_init((void *)dtbp) != 0)
|
|
while (1);
|
|
|
|
if (fdt_immr_addr(CCSRBAR_VA) != 0)
|
|
while (1);
|
|
|
|
OF_interpret("perform-fixup", 0);
|
|
|
|
/* Initialize TLB1 handling */
|
|
tlb1_init(fdt_immr_pa);
|
|
|
|
/* Reset Time Base */
|
|
mttb(0);
|
|
|
|
/* Init params/tunables that can be overridden by the loader. */
|
|
init_param1();
|
|
|
|
/* Start initializing proc0 and thread0. */
|
|
proc_linkup0(&proc0, &thread0);
|
|
thread0.td_frame = &frame0;
|
|
|
|
/* Set up per-cpu data and store the pointer in SPR general 0. */
|
|
pc = &__pcpu[0];
|
|
pcpu_init(pc, 0, sizeof(struct pcpu));
|
|
pc->pc_curthread = &thread0;
|
|
__asm __volatile("mtsprg 0, %0" :: "r"(pc));
|
|
|
|
/* Initialize system mutexes. */
|
|
mutex_init();
|
|
|
|
/* Initialize the console before printing anything. */
|
|
cninit();
|
|
|
|
/* Print out some debug info... */
|
|
debugf("%s: console initialized\n", __func__);
|
|
debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp);
|
|
debugf(" end = 0x%08x\n", (u_int32_t)end);
|
|
debugf(" boothowto = 0x%08x\n", boothowto);
|
|
debugf(" kernel ccsrbar = 0x%08x\n", CCSRBAR_VA);
|
|
debugf(" MSR = 0x%08x\n", mfmsr());
|
|
debugf(" HID0 = 0x%08x\n", mfspr(SPR_HID0));
|
|
debugf(" HID1 = 0x%08x\n", mfspr(SPR_HID1));
|
|
debugf(" BUCSR = 0x%08x\n", mfspr(SPR_BUCSR));
|
|
|
|
__asm __volatile("msync; isync");
|
|
csr = ccsr_read4(OCP85XX_L2CTL);
|
|
debugf(" L2CTL = 0x%08x\n", csr);
|
|
|
|
debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp);
|
|
|
|
print_kernel_section_addr();
|
|
print_kenv();
|
|
//tlb1_print_entries();
|
|
//tlb1_print_tlbentries();
|
|
|
|
kdb_init();
|
|
|
|
#ifdef KDB
|
|
if (boothowto & RB_KDB)
|
|
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
|
|
#endif
|
|
|
|
/* Initialise platform module */
|
|
platform_probe_and_attach();
|
|
|
|
/* Initialise virtual memory. */
|
|
pmap_mmu_install(MMU_TYPE_BOOKE, 0);
|
|
pmap_bootstrap((uintptr_t)kernel_text, end);
|
|
debugf("MSR = 0x%08x\n", mfmsr());
|
|
//tlb1_print_entries();
|
|
//tlb1_print_tlbentries();
|
|
|
|
/* Initialize params/tunables that are derived from memsize. */
|
|
init_param2(physmem);
|
|
|
|
/* Finish setting up thread0. */
|
|
thread0.td_pcb = (struct pcb *)
|
|
((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE -
|
|
sizeof(struct pcb)) & ~15);
|
|
bzero((void *)thread0.td_pcb, sizeof(struct pcb));
|
|
pc->pc_curpcb = thread0.td_pcb;
|
|
|
|
/* Initialise the message buffer. */
|
|
msgbufinit(msgbufp, msgbufsize);
|
|
|
|
/* Enable Machine Check interrupt. */
|
|
mtmsr(mfmsr() | PSL_ME);
|
|
isync();
|
|
|
|
/* Enable D-cache if applicable */
|
|
csr = mfspr(SPR_L1CSR0);
|
|
if ((csr & L1CSR0_DCE) == 0) {
|
|
dcache_inval();
|
|
dcache_enable();
|
|
}
|
|
|
|
csr = mfspr(SPR_L1CSR0);
|
|
if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR0_DCE) == 0)
|
|
printf("L1 D-cache %sabled\n",
|
|
(csr & L1CSR0_DCE) ? "en" : "dis");
|
|
|
|
/* Enable L1 I-cache if applicable. */
|
|
csr = mfspr(SPR_L1CSR1);
|
|
if ((csr & L1CSR1_ICE) == 0) {
|
|
icache_inval();
|
|
icache_enable();
|
|
}
|
|
|
|
csr = mfspr(SPR_L1CSR1);
|
|
if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR1_ICE) == 0)
|
|
printf("L1 I-cache %sabled\n",
|
|
(csr & L1CSR1_ICE) ? "en" : "dis");
|
|
|
|
debugf("%s: SP = 0x%08x\n", __func__,
|
|
((uintptr_t)thread0.td_pcb - 16) & ~15);
|
|
|
|
return (((uintptr_t)thread0.td_pcb - 16) & ~15);
|
|
}
|
|
|
|
#define RES_GRANULE 32
|
|
extern uint32_t tlb0_miss_locks[];
|
|
|
|
/* Initialise a struct pcpu. */
|
|
void
|
|
cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
|
|
{
|
|
|
|
pcpu->pc_tid_next = TID_MIN;
|
|
|
|
#ifdef SMP
|
|
uint32_t *ptr;
|
|
int words_per_gran = RES_GRANULE / sizeof(uint32_t);
|
|
|
|
ptr = &tlb0_miss_locks[cpuid * words_per_gran];
|
|
pcpu->pc_booke_tlb_lock = ptr;
|
|
*ptr = TLB_UNLOCKED;
|
|
*(ptr + 1) = 0; /* recurse counter */
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Flush the D-cache for non-DMA I/O so that the I-cache can
|
|
* be made coherent later.
|
|
*/
|
|
void
|
|
cpu_flush_dcache(void *ptr, size_t len)
|
|
{
|
|
/* TBD */
|
|
}
|
|
|
|
void
|
|
spinlock_enter(void)
|
|
{
|
|
struct thread *td;
|
|
register_t msr;
|
|
|
|
td = curthread;
|
|
if (td->td_md.md_spinlock_count == 0) {
|
|
msr = intr_disable();
|
|
td->td_md.md_spinlock_count = 1;
|
|
td->td_md.md_saved_msr = msr;
|
|
} else
|
|
td->td_md.md_spinlock_count++;
|
|
critical_enter();
|
|
}
|
|
|
|
void
|
|
spinlock_exit(void)
|
|
{
|
|
struct thread *td;
|
|
register_t msr;
|
|
|
|
td = curthread;
|
|
critical_exit();
|
|
msr = td->td_md.md_saved_msr;
|
|
td->td_md.md_spinlock_count--;
|
|
if (td->td_md.md_spinlock_count == 0)
|
|
intr_restore(msr);
|
|
}
|
|
|
|
/* Shutdown the CPU as much as possible. */
|
|
void
|
|
cpu_halt(void)
|
|
{
|
|
|
|
mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE));
|
|
while (1);
|
|
}
|
|
|
|
int
|
|
ptrace_set_pc(struct thread *td, unsigned long addr)
|
|
{
|
|
struct trapframe *tf;
|
|
|
|
tf = td->td_frame;
|
|
tf->srr0 = (register_t)addr;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ptrace_single_step(struct thread *td)
|
|
{
|
|
struct trapframe *tf;
|
|
|
|
tf = td->td_frame;
|
|
tf->srr1 |= PSL_DE;
|
|
tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ptrace_clear_single_step(struct thread *td)
|
|
{
|
|
struct trapframe *tf;
|
|
|
|
tf = td->td_frame;
|
|
tf->srr1 &= ~PSL_DE;
|
|
tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
kdb_cpu_clear_singlestep(void)
|
|
{
|
|
register_t r;
|
|
|
|
r = mfspr(SPR_DBCR0);
|
|
mtspr(SPR_DBCR0, r & ~DBCR0_IC);
|
|
kdb_frame->srr1 &= ~PSL_DE;
|
|
}
|
|
|
|
void
|
|
kdb_cpu_set_singlestep(void)
|
|
{
|
|
register_t r;
|
|
|
|
r = mfspr(SPR_DBCR0);
|
|
mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM);
|
|
kdb_frame->srr1 |= PSL_DE;
|
|
}
|
|
|
|
void
|
|
bzero(void *buf, size_t len)
|
|
{
|
|
caddr_t p;
|
|
|
|
p = buf;
|
|
|
|
while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
|
|
*p++ = 0;
|
|
len--;
|
|
}
|
|
|
|
while (len >= sizeof(u_long) * 8) {
|
|
*(u_long*) p = 0;
|
|
*((u_long*) p + 1) = 0;
|
|
*((u_long*) p + 2) = 0;
|
|
*((u_long*) p + 3) = 0;
|
|
len -= sizeof(u_long) * 8;
|
|
*((u_long*) p + 4) = 0;
|
|
*((u_long*) p + 5) = 0;
|
|
*((u_long*) p + 6) = 0;
|
|
*((u_long*) p + 7) = 0;
|
|
p += sizeof(u_long) * 8;
|
|
}
|
|
|
|
while (len >= sizeof(u_long)) {
|
|
*(u_long*) p = 0;
|
|
len -= sizeof(u_long);
|
|
p += sizeof(u_long);
|
|
}
|
|
|
|
while (len) {
|
|
*p++ = 0;
|
|
len--;
|
|
}
|
|
}
|
|
|